Figure 14From: Studies on Preparation of Photosensitizer Loaded Magnetic Silica Nanoparticles and Their Anti-Tumor Effects for Targeting Photodynamic TherapyDark cytotoxicity of PHPP-SMNPs. SW480 cells were incubated with 0–80 μmol L−1PHPP-SMNPs for 24 h at 37 °C in the dark. Cell toxicity was determined by MTT assay. Data represent mean ± SD (n = 3)Back to article page